How Do I Turn Off DAC On My Toyota Highlander?

Turning off DAC on your Toyota Highlander is simple. This article from millertoyota.net will tell you how to disable the Downhill Assist Control (DAC) system on your Toyota Highlander, understand when it’s best used, and address any potential issues you might encounter. We will provide comprehensive guidance for operating this feature effectively.

1. What is Downhill Assist Control (DAC) and How Does it Work?

Downhill Assist Control (DAC) is a system designed to help drivers safely descend steep or slippery hills at low speeds. When activated, DAC automatically controls the vehicle’s braking to maintain a constant speed, typically around 3 mph (5 km/h), allowing the driver to focus on steering. According to Toyota’s official website, DAC enhances vehicle control on challenging terrains by preventing wheel lockup and maintaining stability.

DAC works by:

Monitoring Wheel Speed: Sensors detect when a wheel is about to lock up.
Applying Brakes Automatically: The system modulates the brakes on individual wheels to prevent skidding and maintain a controlled descent.
Maintaining Constant Speed: DAC keeps the vehicle at a slow, steady pace without requiring the driver to use the brake pedal.

2. How to Turn Off DAC on a Toyota Highlander

Disabling DAC on your Toyota Highlander is straightforward and involves a single step.

Press the “DAC” Switch: Locate the “DAC” switch on your dashboard, usually near the gear shifter. Press it once to turn the system off. The DAC indicator light on your instrument panel will turn off, indicating that the system is no longer active. According to the Toyota Highlander owner’s manual, pressing the switch again deactivates the system.

3. Understanding the DAC Indicator Light

The DAC indicator light provides important information about the system’s status.

Solid Light: Indicates that the DAC system is activated and ready to use.
Flashing Light: Can indicate several things:
- The system is currently operating.
- The system is temporarily unavailable due to certain conditions (e.g., vehicle speed too high).
- There may be a malfunction in the system.

If the DAC indicator light is flashing and the system is not operating as expected, consult your Toyota dealer for assistance. Miller Toyota in Boise can diagnose and repair any issues with your DAC system.

4. When Should You Turn Off DAC?

While DAC is helpful in specific situations, it’s not always necessary or desirable. Here are scenarios where you might want to turn it off:

Normal Road Conditions: On paved roads with minimal inclines, DAC is not needed and can be turned off.
Moderate Slopes: For slight downhill grades where you prefer to control your speed manually.
High-Speed Driving: DAC is designed for low-speed operation (below 15 mph or 25 km/h). It will not function at higher speeds.
Specific Driving Preferences: Some drivers prefer to maintain complete control over braking and may choose to disable DAC.

5. Conditions Where DAC May Not Operate

There are specific conditions under which the DAC system will not engage or may automatically disengage:

Shift Lever Position: DAC only operates when the shift lever is in the “1” range of S mode or R (Reverse).
Vehicle Speed: If the vehicle’s speed exceeds 15 mph (25 km/h), DAC will not activate or will stop operating.
Accelerator or Brake Pedal Use: Pressing the accelerator or brake pedal while DAC is active will cause the system to disengage, although the DAC indicator light may remain on.
System Overheat: Continuous operation of DAC can cause the brake actuator to overheat. If this happens, the system will stop, a buzzer will sound, and the DAC indicator light will flash.

6. What to Do If DAC Overheats

If the DAC system overheats, it will automatically shut down to protect the braking components.

Stop Using DAC: Refrain from using the system until the DAC indicator light stays on continuously, indicating that the system has cooled down.
Continue Driving Normally: You can continue to drive the vehicle normally without using DAC. There is no need to stop or pull over unless other warning lights appear.
Allow Cooling: The system will typically cool down after a short period of normal driving.

7. Potential Issues and Troubleshooting

While DAC is a reliable system, some issues may arise. Here are common problems and troubleshooting steps:

DAC Not Engaging:
- Check Shift Lever: Ensure the shift lever is in the correct position (“1” range of S mode or R).
- Check Vehicle Speed: Make sure the vehicle speed is below 15 mph (25 km/h).
- Avoid Pedal Use: Do not press the accelerator or brake pedal while trying to activate DAC.
DAC Disengaging Unexpectedly:
- Check Pedal Use: Ensure you are not accidentally pressing the accelerator or brake pedal.
- Monitor Indicator Light: If the DAC indicator light is flashing, the system may have detected a problem.
Slip Indicator Light On:
- Potential Malfunction: This may indicate a malfunction in the DAC system or related components.
- Contact Dealer: Consult your Toyota dealer, such as Miller Toyota in Boise, for diagnosis and repair.

8. Safety Precautions When Using DAC

While DAC can be a valuable aid, it’s essential to use it responsibly and be aware of its limitations:

Don’t Rely Too Heavily on DAC: DAC is a supplementary system and should not be used as a substitute for careful driving practices.
Be Prepared for Slippage: On extremely steep inclines, icy surfaces, or muddy roads, the vehicle may still slip, and DAC may not be able to maintain a constant speed.
Avoid Sudden Shifts: Do not shift the shift lever to R while driving forward or to D while driving backward, as this can cause the wheels to lock up and damage the transmission.
Maintain Steering Control: Always focus on steering the vehicle and making necessary adjustments to avoid obstacles.

According to safety guidelines provided by Toyota, drivers should always remain attentive and prepared to take control of the vehicle, especially in challenging driving conditions.

9. DAC Operation Sound

During operation, the DAC system may produce sounds from the engine compartment. This is normal and does not indicate a malfunction. Additionally, if you depress the accelerator or brake pedal while DAC is active, you may hear a sound or feel a push-back from the brake pedal. This is also a normal part of the system’s operation.

10. Maintaining Your Toyota Highlander at Miller Toyota

Regular maintenance is crucial to ensure your Toyota Highlander’s systems, including DAC, function properly. Miller Toyota in Boise offers comprehensive service and maintenance for all Toyota vehicles.

Expert Technicians: Miller Toyota employs certified technicians who are trained to diagnose and repair any issues with your vehicle.
Genuine Toyota Parts: We use only genuine Toyota parts to ensure the highest quality and reliability.
Comprehensive Service: From routine maintenance to complex repairs, Miller Toyota provides a full range of services to keep your Highlander in top condition.

Visit millertoyota.net to schedule a service appointment or learn more about our services.

11. Exploring the Toyota Highlander at Miller Toyota

If you’re considering purchasing a new or used Toyota Highlander, Miller Toyota in Boise is your go-to destination. We offer a wide selection of Highlanders with various features and options.

New Highlander Inventory: Browse our online inventory to find the latest Highlander models with advanced technology and safety features.
Used Highlander Selection: Explore our certified pre-owned Highlanders that offer excellent value and reliability.
Knowledgeable Staff: Our friendly and knowledgeable staff can help you find the perfect Highlander to fit your needs and budget.

Visit our dealership at 208 N Maple Grove Rd, Boise, ID 83704, or call us at +1 (208) 376-8888 to schedule a test drive.

12. Additional Driving Assist Systems in the Toyota Highlander

The Toyota Highlander is equipped with several driving assist systems to enhance safety and performance.

Pre-Collision System (PCS): Detects potential frontal collisions and automatically engages safety systems like brakes and seat belts.
Lane Departure Alert (LDA): Warns you if the vehicle starts to drift out of its lane.
Dynamic Radar Cruise Control (DRCC): Maintains a set speed and distance from the vehicle ahead.
Blind Spot Monitor (BSM): Alerts you to vehicles in your blind spots.

These systems work together to provide a safer and more confident driving experience.

13. Understanding Toyota Highlander Trim Levels

The Toyota Highlander comes in various trim levels, each offering different features and amenities.

Trim Level	Key Features
L	Standard safety features, базовый entertainment system
LE	Upgraded infotainment system, blind spot monitoring
XLE	Leather seats, sunroof, enhanced comfort features
Limited	Premium audio system, heated seats, advanced safety technologies
Platinum	Top-of-the-line features, panoramic view monitor, premium interior
Hybrid Models	Available in LE, XLE, Limited, and Platinum trims with hybrid powertrain for enhanced fuel efficiency

Choosing the right trim level depends on your specific needs and preferences.

14. Tips for Safe Driving in Boise, Idaho

Driving in Boise, Idaho, requires awareness of local conditions and traffic patterns. Here are some tips for safe driving:

Be Aware of Weather: Boise can experience varied weather conditions, including snow and ice in the winter. Adjust your driving accordingly.
Watch for Pedestrians and Cyclists: Boise has a thriving pedestrian and cycling community. Be vigilant and share the road.
Obey Speed Limits: Adhere to posted speed limits and traffic laws.
Avoid Distractions: Stay focused on the road and avoid using your phone or other devices while driving.
Plan Your Route: Use navigation apps to plan your route and avoid traffic congestion.

By following these tips, you can enhance your safety on the roads of Boise.

15. Finding Genuine Toyota Parts at Miller Toyota

If you need replacement parts for your Toyota Highlander, Miller Toyota offers a wide selection of genuine Toyota parts.

Quality Assurance: Genuine Toyota parts are designed and manufactured to meet the highest standards of quality and reliability.
Perfect Fit: These parts are specifically designed for your vehicle, ensuring a perfect fit and optimal performance.
Warranty Coverage: Genuine Toyota parts come with a warranty for added peace of mind.

Visit our parts department at Miller Toyota or order online at millertoyota.net.

16. Financing Options for Your Toyota Highlander

Miller Toyota offers a variety of financing options to help you purchase your dream Toyota Highlander.

Competitive Rates: We work with multiple lenders to provide competitive interest rates and flexible payment terms.
Lease Options: Consider leasing a Highlander for lower monthly payments and the option to upgrade to a new model every few years.
Online Application: Apply for financing online at millertoyota.net to get pre-approved before visiting the dealership.
Expert Advice: Our finance team can help you find the best financing solution to fit your budget and financial goals.

17. Why Choose Miller Toyota?

Miller Toyota is committed to providing exceptional service and a hassle-free car-buying experience.

Customer Satisfaction: We prioritize customer satisfaction and strive to exceed your expectations.
Wide Selection: We offer a wide selection of new and used Toyota vehicles to choose from.
Transparent Pricing: We provide transparent pricing and upfront information to help you make informed decisions.
Community Involvement: Miller Toyota is proud to be an active member of the Boise community.

Visit Miller Toyota at 208 N Maple Grove Rd, Boise, ID 83704, or contact us at +1 (208) 376-8888 to experience the Miller Toyota difference.

18. Understanding the Toyota Safety Sense Suite

The Toyota Highlander comes standard with Toyota Safety Sense (TSS), a suite of advanced safety features designed to help protect you and your passengers.

Pre-Collision System with Pedestrian Detection: Helps mitigate or avoid collisions with vehicles or pedestrians.
Lane Departure Alert with Steering Assist: Alerts you if you start to drift out of your lane and provides gentle steering assistance.
Automatic High Beams: Automatically switches between high and low beams for optimal visibility.
Dynamic Radar Cruise Control: Maintains a set speed and distance from the vehicle ahead.
Road Sign Assist: Detects and displays road signs to help you stay informed.

These features enhance safety and provide added peace of mind on the road. According to Toyota’s safety reports, these features significantly reduce the risk of accidents.

19. How to Customize Your Toyota Highlander

Personalize your Toyota Highlander with a variety of accessories and options.

Exterior Accessories: Add features like roof racks, running boards, and splash guards to enhance the appearance and functionality of your Highlander.
Interior Accessories: Customize the interior with floor mats, cargo organizers, and seat covers.
Technology Upgrades: Upgrade the audio system, add a rear-seat entertainment system, or install a remote start system.
Performance Enhancements: Improve handling and performance with upgraded suspension components and performance tires.

Visit the parts department at Miller Toyota to explore the available customization options.

20. Tips for Improving Fuel Efficiency in Your Toyota Highlander

Maximize fuel efficiency in your Toyota Highlander with these tips:

Drive Smoothly: Avoid rapid acceleration and hard braking.
Maintain Proper Tire Pressure: Check and maintain the recommended tire pressure for optimal fuel economy.
Reduce Weight: Remove unnecessary items from your vehicle to reduce weight and improve fuel efficiency.
Use Cruise Control: Use cruise control on the highway to maintain a consistent speed.
Regular Maintenance: Keep your vehicle properly maintained with regular oil changes and tune-ups.

By following these tips, you can save money on fuel and reduce your carbon footprint. According to EPA estimates, these practices can improve fuel economy by up to 15%.

21. Exploring the Hybrid Options for the Toyota Highlander

The Toyota Highlander is available in hybrid models that offer enhanced fuel efficiency and reduced emissions.

Hybrid Powertrain: Combines a gasoline engine with an electric motor for improved fuel economy.
Regenerative Braking: Captures energy during braking and stores it in the battery.
Electric-Only Mode: Allows you to drive short distances on electric power alone.

The hybrid Highlander is an excellent choice for those looking to reduce their environmental impact and save money on fuel.

22. Understanding the Warranty Coverage for Your Toyota Highlander

Your Toyota Highlander comes with a comprehensive warranty that covers various components and systems.

Basic Warranty: Covers defects in materials and workmanship for 3 years or 36,000 miles.
Powertrain Warranty: Covers major powertrain components for 5 years or 60,000 miles.
Hybrid Warranty: Covers hybrid-related components for 8 years or 100,000 miles.
Corrosion Warranty: Covers corrosion damage for 5 years with unlimited mileage.

Refer to your warranty booklet for complete details and coverage information. Miller Toyota can assist you with any warranty-related issues.

23. Tips for Off-Road Driving with Your Toyota Highlander

While the Toyota Highlander is primarily designed for on-road use, it can handle light off-road conditions with proper techniques.

Select the Right Drive Mode: Use the appropriate drive mode for the terrain (e.g., mud and sand mode).
Maintain a Steady Speed: Avoid sudden acceleration and braking.
Be Aware of Ground Clearance: Be mindful of the vehicle’s ground clearance to avoid obstacles.
Use Downhill Assist Control: Engage DAC when descending steep hills.
Carry Recovery Gear: Bring essential recovery gear, such as a tow strap and shovel.

Always exercise caution and avoid challenging off-road conditions that could damage the vehicle.

24. How to Care for Your Toyota Highlander’s Interior

Keep your Toyota Highlander’s interior looking its best with these care tips:

Regular Cleaning: Vacuum the interior regularly to remove dirt and debris.
Protect Surfaces: Use a protectant on vinyl and leather surfaces to prevent cracking and fading.
Clean Spills Immediately: Clean up spills promptly to prevent staining.
Use Floor Mats: Protect the carpets with floor mats.
Air Fresheners: Use air fresheners to keep the interior smelling fresh.

By following these tips, you can maintain a clean and comfortable interior for years to come.

25. Connecting Your Smartphone to Your Toyota Highlander

Seamlessly integrate your smartphone with your Toyota Highlander using Apple CarPlay or Android Auto.

Connect via USB: Plug your smartphone into the USB port in your vehicle.
Follow On-Screen Prompts: Follow the prompts on the infotainment screen to connect your device.
Access Apps: Access your favorite apps, such as music, navigation, and messaging, through the infotainment system.
Use Voice Commands: Use voice commands to control your smartphone hands-free.

Enjoy a safer and more convenient driving experience with smartphone integration.

26. Understanding the Maintenance Schedule for Your Toyota Highlander

Follow the recommended maintenance schedule to keep your Toyota Highlander running smoothly.

Service	Interval	Description
Oil Change	Every 5,000 miles	Change the engine oil and filter.
Tire Rotation	Every 5,000 miles	Rotate the tires to promote even wear.
Fluid Checks	Every 5,000 miles	Check and top off fluids, including coolant, brake fluid, and power steering fluid.
Inspection	Every 15,000 miles	Inspect brakes, suspension, and other critical components.
Spark Plugs	Every 30,000 miles	Replace the spark plugs.

Refer to your owner’s manual for the complete maintenance schedule. Schedule your service appointments at Miller Toyota to ensure your vehicle receives the proper care.

27. Navigating the Infotainment System in Your Toyota Highlander

Master the features of your Toyota Highlander’s infotainment system.

Touchscreen Display: Use the touchscreen display to access various functions.
Voice Commands: Use voice commands for hands-free control.
Navigation System: Use the navigation system to find your way to your destination.
Audio System: Enjoy your favorite music and podcasts through the audio system.
Settings Menu: Customize the system settings to your preferences.

Explore the features of the infotainment system to enhance your driving experience.

28. Maximizing Cargo Space in Your Toyota Highlander

The Toyota Highlander offers ample cargo space for your belongings.

Folding Seats: Fold down the rear seats to create more cargo space.
Cargo Organizer: Use a cargo organizer to keep your items neat and secure.
Roof Rack: Add a roof rack to carry larger items, such as luggage and sporting equipment.
Cargo Net: Use a cargo net to prevent items from shifting during transport.

Take advantage of the versatile cargo space in your Toyota Highlander.

29. Understanding the Safety Ratings for the Toyota Highlander

The Toyota Highlander has earned top safety ratings from leading safety organizations.

IIHS Top Safety Pick+: The Insurance Institute for Highway Safety (IIHS) has awarded the Highlander its Top Safety Pick+ designation.
NHTSA 5-Star Rating: The National Highway Traffic Safety Administration (NHTSA) has given the Highlander a 5-star overall safety rating.

These ratings reflect the Highlander’s commitment to safety and its ability to protect occupants in the event of a crash.

30. Addressing Common Toyota Highlander Questions

Here are some frequently asked questions about the Toyota Highlander:

How do I turn off the DAC on my Toyota Highlander?
- To turn off DAC, simply press the “DAC” switch located on the dashboard. The DAC indicator light will turn off, indicating that the system is disabled.
When should I use Downhill Assist Control?
- Use DAC when descending steep or slippery hills at low speeds to maintain control and prevent wheel lockup.
What does the flashing DAC indicator light mean?
- A flashing DAC indicator light can indicate that the system is operating, temporarily unavailable, or experiencing a malfunction.
Can I use DAC at high speeds?
- No, DAC is designed for low-speed operation (below 15 mph or 25 km/h) and will not function at higher speeds.
What should I do if the DAC system overheats?
- If the DAC system overheats, stop using it and allow it to cool down. The DAC indicator light will stay on continuously when the system is ready for use again.
Is it normal to hear sounds during DAC operation?
- Yes, it’s normal to hear sounds from the engine compartment during DAC operation. These sounds do not indicate a malfunction.
Where can I get my Toyota Highlander serviced in Boise?
- Visit Miller Toyota in Boise for expert service and maintenance for your Toyota Highlander.
Does the Toyota Highlander have other driving assist systems?
- Yes, the Toyota Highlander is equipped with several driving assist systems, including Pre-Collision System, Lane Departure Alert, and Dynamic Radar Cruise Control.
What are the different trim levels available for the Toyota Highlander?
- The Toyota Highlander is available in L, LE, XLE, Limited, Platinum, and hybrid models.
Where can I find genuine Toyota parts for my Highlander?
- You can find genuine Toyota parts at Miller Toyota in Boise.

By providing clear and comprehensive information, this guide aims to help Toyota Highlander owners understand and effectively use the Downhill Assist Control system. For further assistance or to explore Toyota services and vehicles, visit millertoyota.net.